An occasionally hilarious 1993 parody of the rap music industry, "CB4" stars Chris Rock as MC Gusto, one part of the rap group CB4 (Cell Block 4). As the film begins, documentary filmmaker A. White (Chris Elliot) sits down to show the group (which also includes Deezer D. as Otis a.k.a. Stab Master Arson, and Allen Payne as Euripides Smalls a.k.a. Dead Mike) a rough cut of his documentary. As the documentary opens, we learn more about the rap group's history, as they came up from a middle-class background to become one of the world's most popular and most dangerous groups. When the criminal whose persona Gusto stold (Charlie Murphy) breaks out of jail, the group finds themselves in some serious trouble.

Plot isn't exactly the film's strongest point, but CB4 still manages to succeed as a good-hearted parody of rap, stringing together enough amusing situations to carry it along. The film's silly sense of humor also keeps things light and quick - the fact that the film doesn't take itself at all seriously helps quite a bit.

The film's performances are also quite good. A fairly early performance from Chris Rock doesn't show the kind of timing the comedian often shows in film and on stage today, but he still shows potential and plays the character's current state and earlier days superbly. Supporting performances from Allen Payne, Phil Hartman, Charles Murphy (Eddie's brother) and others are also solid, as well.

Although the low-budget film doesn't have much of a visual style, director Tamara Davis ("Billy Madison") handles the picture admirably, taking the same approach to the comedy that she did with "Half Baked", another cult favorite. The film is a little sloppy, a little rough, but overall, it works to the film's advantage.